Nutritional Evaluation And Application Of Rice Flour In Chinese Yellow-Feather Broiler Diet

The purpose of this study was designed to research the nutrition value of the rice flour,and vestigate the cecectomy on the metabolizable energy: AME AMEn TME TMEn ; themetabolizable rate of AME AMEn TME TMEn and amino acid digestibility of rice flour inChinese yellow-feather broiler , and study the influence of partly replacing corn of rice flouron Chinese yellow-feather broiler performance.According to the determined data of the fourparts of experiments ,evaluating the nutritional evaluation of rice flour. The results were asfollows:1. The unconventional nutritional contents of rice flour are: DM 87.26%,CP 14.93%,EE4.92%,ASH 7.27%,CF 0.208%,NFE 59.93%,Ca 0.094%,P 1.623%; the amino acid contentis:Asp 1.27%,Thr 0.5792%,Ser 0.7136%,Glu 2.236%,Pro 0.6418%,Gly 0.6679%,Ala0.8134%,Cys 0.2121%,Val 0.7076%,Met 0.3001%,Ile 0.51%,Leu 1.079,Tyr 0.5882%,Phe0.6944%,Lys 0.6465%,His 0.4465,Arg 1.053% and the total energy is 16.45MJ/kg.As a kindof energy feed, the contents of the protein , EAA,total EAA and Ca,P of rice flour are betterthan that of corn ,while the proportion of Met+Cys in CP is lower than that of corn andproportion of Ca,P is not very good. When rice flour served as the feedstuff of poultry, thebalance of EAA and Ca,P should be attentioned.2. The AME AMEn TME TMEn and metabolizable rate of AME AMEn TME TMEnof cecectomized birds were higher than intact birds. There was no significant difference of theAME AMEn TME TMEn and metabolizable rate of AME AMEn TME TMEn betweentwo types of birds (P>0.05) .Cecotomized birds excreted more endogenous energy than intactbirds (P>0.05). The determined results of intact birds are recommended. The AME AMEnTME TMEn of rice flour is12.92MJ/kg(3.09kcal/kg) 14.01 MJ/kg (3.35 kcal/kg) 14.98MJ/kg (3.58 kcal/kg) 12.19 MJ/kg (2.91 kcal/kg).The metabolizable rate of AME AMEnTME TMEn of rice flour is 68.6%, 74.39%, 79.51%, 64.71%.The GE of rice flour is16.45MJ/kg,and approached to that of corn.The metabolizable rate of energy is lower thanthat of corn.The metabolizable energy is 95.7% of corn.As a kind of energy ,the metabolizableenergy is inferior to corn,rough rice and broken rice ,but higher than paddy and rice bran.3. The apparent and true digestibility of cecectomized birds were greater than intact birds.AAAD of His, Ala, Leu and Lys were significantly great (P<0.05) . There was significantdifference of TAAD in Ala between two types of birds (P<0.05) ,while Tyr was numericaldifference (P<0.01). There was no significant difference in total amino acid digestibilitybetween intact and cecotomized birds (P>0.05) .Cecectomized birds excreted moreendogenous amino acids than intact birds (P>0.05) . The apparent and true AA digestibility ofrice flour is 72.37% and 82.40%.The protein quality of rice flour was better thancorn,paddy,rough rice and rice bran. The digestable Arg is the highest and the digestable Metand Cys is lower in rice flour. True AA digestibility of rice flour is lower than corn of gradeand rough rice ,and higher than rice bran. True digestibility of AA, except Arg,Cys, Tyr,Thrand Val , is lower than corn of grade . True AA digestibility of rice flour is lower than cornof grade and rough rice ,and higher than rice bran. True digestibility of AA, exceptHis,Met,Lys,Cys, and Val , is lower than paddy.In conlusion, digestibility of AA is lower thancorn and rough rice ,and higher than paddy and rice bran.4. The amount of digestable Cys and Leu is lower than corn of grade , and is 99.1% and96.6% of corn, respectively. The amount of others and the total amino acids are significantlygreater than grade , grade ,paddy and rough rice.Except of Ile, Lys and Lys , the amount ofdigestable AA is higher than rice bran .The above results suggested that the nutritive value ofrice flour is better than corn ,paddy, rough rice and rice bran ,and when it is used in the feed ofpoultry , rice flour is good to improve the banlance of AA of feed , and increase the nutritivevalue of the protein of fee...